The Justinuschurch in Höchst was built approximately 850 and is therefore the oldest church in Frankfurt. It was inaugurated by archbishop Rhabanus Maurus. The church served Höchst and the surrounding area originally as a parish church.

The Carmelite Cloister is located just west of the Roemer between Muenzgasse and Alte Mainzer Gasse. The oldest buildings date between 1246-1510. The Carmelite Cloister was heavily damaged in the air raids of 1944, and restored after the war.

The Church of our Lady (Liebfrauenkirche) was donated by Wigel von Wanebach in the second decade of the 14th century. His tombstone from 1322 is still inside the church. The original tiny building was enlarged in the 15th century.

The chapel is the oldest room in Frankfurt, having remarkably survived the bombings of the 2nd World War while most of the Saalhof was severely damaged. The simple Romanesque chapel was probably built late in the 1100s during the reign of Emperor Friedrich Barbarossa.

St. Paul's Church was the site of the first German National Assembly in 1848 and the cradle of German democracy. It was rebuilt after the war and is located north of the Roemer.

The church was built in 1290 to replace the court chapel in the Saalhof and was dedicated to St. Nikolai (Nicholas) patron saint of boatmen. Extensive renovations in the mid 1400s gave the church its present high tower and steep roof.